VWDiesel.net The IDI, TDI, and mTDI source.
Engine Specific Info and Questions => IDI Engine => Topic started by: Baselyne on February 05, 2008, 09:51:31 pm
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In reverse of this thread http://vwdiesel.net/phpBB/viewtopic.php?t=12505
heads mechanical
blocks hydro
what would you say is the chance of getting this to work?
I figure using some parts from 1.5 and some from 1.6 to make the pump work?
wouldnt the oil squirters still be cooling the piston rings?
which head gasket i wonder? I suppose the head would need drilled to fit 12 mm bolts.?
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does this not work or? Imagine you were a newbee and just wanted to know what was avalible as far as options go
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The 1.5 and 1.6 blocks have the same bore. The difference is in stroke. The 1.5 has a shorter stroke. I believe the 1.5 also had a half a point higher compression ratio.
Therefore, the 1.5 head has smaller swirl chambers. If you put it on a 1.6 block, you'll have even higher compression. Probably a really bad idea if you want to run more than stock boost.
How about a 1.6 head on a 1.6 block, and a 1.5 head on a 1.5 block.
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There's some on-line info at various sites that has bore, stroke and CR for the VW IDI engines. I have one in a word document that I copied off the internets. I'm not smart enough to successfully cut and paste it here.
A long time ago, I worked the bore, stroke, and CR stuff backwards and came up with these BALL PARK numbers for the swirl chamber volume differences. I have all these heads in my garage, and a burette, and sometime I will actually measure them with an injector, heat shield, and glow plug in the hole They are GENERALLY right and good enough my plans, which inclued a frakinmotor this spring. This will yield an extra 1.6 head, and guess where I was thinking of putting that head.
1.5 Swirl chamber volume 11.457 cc
1.6 Swirl chamber volume 12.794 cc
1.9 Swirl chamber volume 16.376 cc
1.6 with 1.9 head CR: 19.357
1.5 with 1.6 head CR: 21.371